我正在尝试从列列表和值列表动态构建 SQL WHERE 子句。为此，我从以下代码开始:
sql_cols = ['description', 'height', 'weight', 'class' ]
sql_vals = [ 1, 2, 3, 4 ]
sql_test = " and".join( " f = :{}".format(x) for x in sql_vals )
print sql_test
这给了我以下结果:
root@scar$ python testme.py
f = :1 and f = :2 and f = :3 and f = :4
但是我想要得到的是这样的:
`DESCRIPTION = :1 and HEIGHT = :2 and WEIGHT = :3 and CLASS = :4`
如何做到这一点？
编辑: 将代码更改为:
sql_test = "and".join( sql_cols[x - 1] + "= :{}".format(x) for x in sql_vals )
一切顺利
最佳答案
你可以用这个代替:
sql_cols = ['description', 'height', 'weight', 'class' ]
sql_vals = [ 1, 2, 3, 4 ]
sql_test = " and ".join("{} = :{}".format(*x) for x in zip(sql_cols,sql_vals) )
print (sql_test)
关于python - 从Python代码中获取列表索引超出范围，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/57205969/